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BIOL - What the crack is Peristalsis?

Biology, Peristalsis, Digestive system, Mechanical and Chemical Digestion, DSE | IB | IGCSE | GCE | AP Biology

May 5, 2018

A lot of us love and crave food 24/7. Although it may be easily accessible, what happens to it and what it resolves to should matter to us as well.

Keep browsing and figure out the crucial process of Peristalsis ( also knows as intestinal motility )...

Brief intro to Digestion

A lot of what we often consume comes in large servings of food. We need to bite it in smaller sizes before swallowing. This encourages both mechanical and chemical digestion which breaks down food into smaller bits and pieces.

A Step closer to Peristalsis

-When the food reaches the stomach after getting squeezed and moved around by the stomach's muscular walls. This is the process of 'PHYSICAL DIGESTION'.

-Food gets moved along the digestive system by the contractions of two sets of muscles.

-One of the set runs along the gut, while the other one revolves around it.

-Their wave-like contractions create a squeezing action which then moves down the gut.

-This series is referred to as peristalsis.

Importance and Functions of Peristalsis

  • Apparently Peristalsis is automatic and important process.
  • It helps move food through digestion 
  • It helps move urine through the bladder  (can be blamed for those tough times when the teacher does not permit leave to the washroom.

Fun fact:

The Peristaltic-wave contractions in the oesophagus of humans are weak compared to other mammals. In cud-chewing (esp cows), reverse Peristalsis can occur so that the food is brought back from the stomach to the mouth for re-chewing {sounds like vomiting or choking in human terms}!

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